A 17-second video was posted on Facebook by Duy Thai and shows a group of three dolphins swimming off the coast of Son Tra peninsula on the morning of June 22, with the clip going viral and quickly amassing 155,000 likes.

Many Vietnamese netizens remarked that it was a strange, rare, and surprising phenomenon to witness.

Nguyen Duc Vu, head of the management board of Son Tra peninsula and Da Nang tourism beaches, said the area boasts a very rich marine ecosystem, with this being the first time that locals have been able to record dolphins swimming off the coast in Son Tra peninsula of Da Nang.

The image of dolphins being spotted close to Son Tra peninsula is a rare phenomenon, with local fishermen believing that the dolphins bring good luck and protect them while they are working at sea.